Good article in the Boston Globe: "To listeners, line blurs between WGBH, WBUR."
It presents a good look at how two NPR-affiliated stations are competing in one market.
Both stations are working on answering the question: How many NPR stations does Boston need?
On the other hand, how many classic rock stations do we need? Or pop? Or country?
The real issue comes down to advertisers and donors -- and getting the former to buy time and the latter to donate to one station over the other.
How many overlapping stations does one market need?